公开(公告)号：US20230062839A1

公开(公告)日：2023-03-02

申请号：US17586024

申请日：2022-01-27

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Yuji NAKAGAWA ,  Masayuki TAKAGISHI ,  Naoyuki NARITA ,  Tazumi NAGASAWA ,  Tomoyuki MAEDA

IPC: G11B5/31 ,  G11B5/235

Abstract: According to one embodiment, a magnetic head includes a magnetic pole, a shield, and a non-magnetic layer. The non-magnetic layer is provided between the magnetic pole and the shield. The non-magnetic layer is in contact with the magnetic pole and the shield. The non-magnetic layer includes a first element including at least one selected from the group consisting of Cu, Au, Cr, V, Al and Ag.

公开(公告)号：US20220399033A1

公开(公告)日：2022-12-15

申请号：US17587198

申请日：2022-01-28

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Yuji NAKAGAWA ,  Naoyuki NARITA ,  Masayuki TAKAGISHI ,  Tomoyuki MAEDA ,  Tazumi NAGASAWA ,  Kenichiro YAMADA ,  Akira KIKITSU

IPC: G11B5/21 ,  G11B5/31

Abstract: A magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element, and a magnetic member. The magnetic element is provided between the first and second magnetic poles, and includes a first magnetic layer. The magnetic member includes a first magnetic part. A second direction from the first magnetic part to the magnetic element crosses a first direction from the first to second magnetic pole. The first magnetic part includes a magnetic material including at least one of first to third materials. The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge and Mn3Ga. The second material includes at least one selected from the group consisting of a cubic or tetragonal compound including Mn and Ni, a cubic alloy including γ-phase Mn, and a cubic alloy including Fe. The third material includes an antiferromagnet.

公开(公告)号：US20220375494A1

公开(公告)日：2022-11-24

申请号：US17817818

申请日：2022-08-05

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Hitoshi IWASAKI ,  Naoyuki NARITA ,  Hirofumi SUTO ,  Masayuki TAKAGISHI ,  Tazumi NAGASAWA

IPC: G11B5/127

Abstract: A magnetic head includes a first magnetic pole, a second magnetic pole, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic member, a second magnetic member provided between the first magnetic member and the second magnetic pole, a first layer provided between the first and second magnetic members, and a second layer provided between the second magnetic member and the second magnetic pole. The first magnetic member includes first magnetic regions and a first nonmagnetic region. The first nonmagnetic region is between the one of the first magnetic regions and the other one of the first magnetic regions.

公开(公告)号：US20200168244A1

公开(公告)日：2020-05-28

申请号：US16552009

申请日：2019-08-27

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Hirofumi SUTO ,  Naoyuki NARITA ,  Tazumi NAGASAWA ,  Masayuki TAKAGISHI ,  Tomoyuki MAEDA

IPC: G11B5/31

Abstract: According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a magnetic layer, first and second conductive layers. The magnetic layer is provided between the magnetic pole and the first shield. The first conductive layer contacts the first shield and the magnetic layer, is provided between the first shield and the magnetic layer, and includes at least one selected from Cu, Ag, and Au. The second conductive layer is provided between the magnetic pole and the magnetic layer. The second conductive layer includes first and second regions. The first region contacts the magnetic layer and includes at least one first element selected from Cu, Ag, Au, Al, Ti, Ru, Mg, and V. The second region is provided between the first region and the magnetic pole and includes at least one second element selected from Ta, Pt, W, Mo, Ir, Cr, Tb, Rh, and Pd.

公开(公告)号：US20200090685A1

公开(公告)日：2020-03-19

申请号：US16351010

申请日：2019-03-12

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Masayuki TAKAGISHI ,  Naoyuki NARITA ,  Tomoyuki MAEDA

IPC: G11B5/31 ,  G11B5/127 ,  G11B5/66

Abstract: According to one embodiment, a magnetic recording device includes a magnetic head, a first electrical circuit, and a second electrical circuit. The magnetic head includes a magnetic pole, a first shield, a conductive member electrically connecting the magnetic pole and the first shield and being provided between the magnetic pole and the first shield, and a coil. The first electrical circuit is configured to supply a first current to the magnetic pole, the conductive member, and the first shield. The second electrical circuit is configured to supply a recording current to the coil. A recording magnetic field is generated from the magnetic pole. The recording magnetic field corresponds to the recording current. A rise time of the recording current is not less than 65% of a shortest bit length.

公开(公告)号：US20200082845A1

公开(公告)日：2020-03-12

申请号：US16299392

申请日：2019-03-12

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Hirofumi SUTO ,  Naoyuki NARITA ,  Tazumi NAGASAWA ,  Masayuki TAKAGISHI ,  Tomoyuki MAEDA

IPC: G11B5/31 ,  G11B5/127

Abstract: According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a magnetic layer, a first conductive layer, and a second conductive layer. The magnetic layer is provided between the magnetic pole and the first shield. The first conductive layer includes at least one of Cu, Ag, Au, Al and Cr, and is provided between the magnetic pole and the first shield. A direction from the first conductive layer toward the magnetic layer crosses a first direction from the magnetic pole toward the first shield. A second conductive layer includes at least one of Ta, Pt, W, Ru, Mo, Ir, Rh, and Pd and is provided at one of a first position or a second position. The first position is between the first conductive layer and the first shield. The second position is between the magnetic pole and the first conductive layer.

公开(公告)号：US20180252780A1

公开(公告)日：2018-09-06

申请号：US15693272

申请日：2017-08-31

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Hitoshi IWASAKI ,  Akira KIKITSU ,  Satoshi SHIROTORI ,  Masayuki TAKAGISHI

IPC: G01R33/09

CPC classification number: G01R33/091 ,  G01R33/093

Abstract: In one embodiment, a magnetic sensor has first and second electrode, a magneto-resistive effect element, an insulating layer between the first electrode and the element, a current source portion and a detecting portion. The element has a length in a first direction along a film surface of the element which is larger than that in a second direction along the film surface and perpendicular to the first direction. The element includes first, non-magnetic and second magnetic layers. The magnetization direction of the first magnetic layer is along the first direction. The element is connected to the first and second electrodes. The current source portion is connected to the first and second electrodes. The detecting portion can detect a second harmonic component in an output signal of the element. The first electrode and the element overlap each other in a third direction perpendicular to the first and the second directions.

公开(公告)号：US20160133293A1

公开(公告)日：2016-05-12

申请号：US14887998

申请日：2015-10-20

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kenichiro YAMADA ,  Masayuki TAKAGISHI ,  Tomoyuki MAEDA ,  Yousuke ISOWAKI ,  Naoyuki NARITA ,  Shuichi MURAKAMI

IPC: G11B20/12 ,  G11B5/012

CPC classification number: G11B20/1217 ,  G11B5/012 ,  G11B5/02 ,  G11B5/82 ,  G11B2020/1238

Abstract: According to one embodiment, a magnetic recording and reproducing device includes a magnetic recording medium, a recording unit, and a reproducing unit. The magnetic recording medium includes a first track including first and second sub-tracks extending in a first direction. The second sub-track is arranged with the first sub-track in a second direction intersecting the first direction. The recording unit records information in the first and second sub-tracks. The reproducing unit reproduces the information recorded in the first and second sub-tracks while opposing the first, second sub-tracks, and a boundary between the first and second sub-tracks. The first sub-track includes first magnetic recording components including first and second components. The second sub-track includes second magnetic recording components including third and fourth components. A first recording symbol is formed of the first and third components. A second recording symbol is formed of the second and fourth components.

Abstract translation: 根据一个实施例，磁记录和再现装置包括磁记录介质，记录单元和再现单元。 磁记录介质包括第一轨道，该第一轨道包括沿第一方向延伸的第一和第二子轨道。 第二子轨道与第一子轨道沿与第一方向相交的第二方向布置。 记录单元将信息记录在第一和第二子轨道中。 再现单元再现与第一和第二子轨道相对的第一和第二子轨道中记录的信息，以及第一和第二子轨道之间的边界。 第一子轨道包括包括第一和第二分量的第一磁记录部件。 第二子轨道包括第二和第四分量的第二磁记录组件。 第一记录符号由第一和第三分量形成。 第二记录符号由第二和第四分量形成。

公开(公告)号：US20160099014A1

公开(公告)日：2016-04-07

申请号：US14838914

申请日：2015-08-28

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Satoshi SHIROTORI ,  Yuuzo KAMIGUCHI ,  Masayuki TAKAGISHI ,  Hitoshi IWASAKI

IPC: G11B5/39 ,  H01L43/12 ,  H01L43/08 ,  G11B5/127 ,  H01L43/02

CPC classification number: G11B5/3903 ,  G01R33/093 ,  G01R33/098 ,  G11B5/1272 ,  G11B5/3906 ,  G11B5/398 ,  H01L43/02 ,  H01L43/08 ,  H01L43/12

Abstract: A magnetoresistive element according to an embodiment includes: a multilayer element including a first magnetic layer, a magnetization direction of the first magnetic layer being pinned, a nonmagnetic layer disposed on the first magnetic layer, a second magnetic layer disposed in a first region on the nonmagnetic layer, a magnetization direction of the second magnetic layer being pinned and antiparallel to the magnetization direction of the first magnetic layer, and a third magnetic layer disposed in a second region that is different from the first region on the nonmagnetic layer near one of two opposite end faces of the nonmagnetic layer, a magnetization direction of the third magnetic layer being changeable by an external magnetic field, a lower face of the nonmagnetic layer being in contact with an upper face of the first magnetic layer.

Abstract translation: 根据实施例的磁阻元件包括：多层元件，包括第一磁性层，第一磁性层被钉扎的磁化方向，设置在第一磁性层上的非磁性层，设置在第一磁性层上的第一区域中的第二磁性层 非磁性层，所述第二磁性层的磁化方向被钉扎并且与所述第一磁性层的磁化方向反平行;以及第三磁性层，设置在与所述非磁性层上的第二区域不同的第二区域 非磁性层的相对端面，第三磁性层的磁化方向由外部磁场变化，非磁性层的下表面与第一磁性层的上表面接触。

公开(公告)号：US20150029609A1

公开(公告)日：2015-01-29

申请号：US14338481

申请日：2014-07-23

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yuuzo KAMIGUCHI ,  Satoshi SHIROTORI ,  Shinobu SUGIMURA ,  Masayuki TAKAGISHI ,  Hitoshi IWASAKI

IPC: G11B5/35 ,  H01F10/08

CPC classification number: G11B5/35 ,  G01R33/093 ,  G01R33/098 ,  G01R33/1284 ,  G11B5/3909 ,  G11B2005/3996 ,  H01F10/08 ,  H01F10/1936 ,  H01F10/3254

Abstract: A spin valve element according to an embodiment includes: a nonmagnetic base layer; a first terminal including a first magnetic layer connecting to a portion near one of opposing end faces of the nonmagnetic base layer; a second terminal including a second magnetic layer disposed and connecting to the nonmagnetic base layer so as to be at a distance from the first terminal; a third terminal including a third magnetic layer disposed and connecting to the nonmagnetic base layer so as to be at distances from the first and second terminals, the second terminal and the third terminal connecting to a current source that passes a sense current, and the first terminal and one of the second terminal and the third terminal connecting to a voltage detection unit that detects a voltage.

Abstract translation: 根据实施例的自旋阀元件包括：非磁性基底层; 第一端子，包括连接到非磁性基底层的相对端面中的一个附近的部分的第一磁性层; 第二端子，包括设置并连接到所述非磁性基底层以与所述第一端子相距一定距离的第二磁性层; 第三端子，包括设置并连接到非磁性基底层的第三磁性层，以便与第一和第二端子相距一定距离，第二端子和第三端子连接到通过感测电流的电流源，第一端子 并且连接到检测电压的电压检测单元的第二端子和第三端子之一。